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Does a Car Need Fuel If It's Not Driven for a Long Time?

2 Answers
BryceDella
07/30/25 12:17am
If a car is not driven for a long time, it's better to fill it halfway with fuel. Below is relevant information about engine oil: 1. Introduction: Engine oil, also known as motor lubricant, with a density of approximately 0.91×10³ (kg/m³), serves to lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is often referred to as the 'blood' of a car. Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil, imparting certain new characteristics, making them an essential part of lubricating oil. 2. Classification: Engine oils on the market can be broadly divided into mineral oils and synthetic oils based on their base oil (vegetable oils are not considered due to their scarcity). Synthetic oils are further categorized into full synthetic and semi-synthetic.
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RubyDella
08/16/25 4:36am
Leaving a car unused for long periods doesn't necessarily require refueling, but beware of fuel degradation issues. With over twenty years of driving experience, I've encountered situations where vehicles sat idle for half a year, only to find the ethanol-blended gasoline in the tank had absorbed moisture and separated, causing failure to start. My recommendation is to fill up the tank and use affordable fuel stabilizers to minimize air exposure and prevent water ingress. Additionally, batteries naturally discharge - I make it a habit to start the engine monthly for a ten-minute run to recharge, while also checking tire pressure to prevent deformation; one oversight cost me extra money for new tire replacements. Overall maintenance proves more crucial than refueling.
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Which Cars Have a Particulate Filter?

Most vehicle models equipped with engines that meet emission standards come with a particulate filter. For example, the Magotan 330 and 380 models do not have particulate filters, while the 280 model does. Most Japanese car models do not have particulate filters, as the majority of small-displacement naturally aspirated engines can easily meet the China VI emission standards without requiring one. A particulate filter is a ceramic filter installed in the diesel engine emission system that captures particulate emissions before they enter the atmosphere. It can reduce soot produced by diesel engines by more than 90%, and the captured particulate matter is subsequently burned off during vehicle operation. Working principle of the particulate filter: The diesel particulate filter is coated with metals such as platinum, rhodium, and palladium. The black smoke containing carbon particles emitted by the diesel engine enters the exhaust particulate trap through a dedicated pipe. After passing through the densely arranged bag-type filter inside, the carbon soot particles are adsorbed onto the filter made of metal fiber felt. When the amount of adsorbed particles reaches a certain level, the burner at the end automatically ignites and burns, converting the adsorbed carbon soot particles into harmless carbon dioxide that is then expelled. To check whether a car has a particulate filter, you can use the following three methods: Check the and to see if there is a particulate filter function. Additionally, you can carefully review the fault codes in the manual to see if there is a "particulate filter" warning light indicator. Check the label on the oil cap. If the oil cap clearly states 0W-20 grade oil, it indicates the presence of a particulate filter. Look behind the three-way catalytic converter to see if there is an additional cylindrical section on the exhaust pipe. If present, that is the particulate filter.
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What causes the left rear wheel to press against the corner during a right-angle turn?

The reasons for the left rear wheel pressing against the edge line during a right-angle turn: the vehicle speed was not properly controlled before entering the turn, and the steering wheel rotation arc was too small. Additionally, the steering wheel rotation speed was too slow before entering the turn. Right-angle turn: A right-angle turn is an assessment point in Subject 2 of the driver's license test. It evaluates the driver's ability to correctly manipulate the steering and accurately judge the inner and outer wheel differentials when driving through sharp turns. Key points include: shifting into first gear, releasing the handbrake, slowly lifting the clutch to maintain semi-engagement for smooth forward movement, keeping the left wiper's left dot (the first rivet) aligned with the right edge yellow line at a 20 cm distance, and then focusing on a point slightly ahead of the front left door lock. Precautions for right-angle turns: While slowly driving into the test area, maintain a 30 cm distance between the vehicle body and the right edge line.
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How to Determine if a Car Fuse is Blown?

To determine if a car fuse is blown, you can inspect the fuse box. A blown fuse will have a broken connection in the middle, while a good one will remain intact. Below is relevant information about car fuses: 1. Function: A car fuse is a type of current protection fuse. When the circuit current exceeds twice the rated current of the fuse, it will melt within seconds, serving as circuit protection. Commonly used for overcurrent protection in automotive circuits, it is also applied in industrial equipment overcurrent protection. 2. Classification: Fuses can be categorized into blade-type automotive fuses (by size: mini, standard, and maxi fuses); glass tube automotive fuses (by size: 5*20mm; 6*30mm fuses); bolt-type automotive fuses (by size: mini and maxi fuses). Current ratings include: 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 25A, 30A, 35A, 40A, 50A, 60A, 80A, 100A. In blade-type automotive fuses, each color represents a different current rating. Certifications include: UL, CSA, ROHS.
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What Causes the Sound of Metal Pieces in the Exhaust Pipe?

Metal noises in the exhaust pipe can be caused by reasons such as a lean air-fuel mixture. Below are the specific causes of metal noises in the exhaust pipe: 1. Lean Air-Fuel Mixture: This typically occurs when the engine backfires in the exhaust pipe at medium to high speeds, improving or disappearing after acceleration. This happens because the spark energy is insufficient to ignite the overly lean mixture, which then combusts in the exhaust pipe, causing backfire. Generally, clearing the fuel injector passages and adjusting the fuel injection quantity can resolve the issue. 2. Exhaust Pipe Backfire: As the name suggests, exhaust pipe backfire refers to the explosion sound caused by unburned combustible mixture reigniting in the exhaust pipe, often accompanied by sparks, commonly known as backfire. 3. Faulty Connecting Components: The exhaust pipe is connected to the engine via a flexible joint, which may become damaged after prolonged use. Additionally, the exhaust pipe is secured to the chassis by several rubber rings—check if these rings are damaged or have aged. Finally, there are seals between the exhaust pipe and the flexible joint, as well as between the flexible joint and the engine; inspect these seals for any damage.
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Is it necessary for young people to obtain a B2 driver's license?

It is necessary for young people to obtain a B2 driver's license. Here are the specific details about the B2 driver's license: 1. Driving scope: In addition to medium and heavy-duty trucks, it also allows driving other permitted vehicle types such as C1, C2, C3, C4, C5, and M. This means small cars, small automatic transmission cars, low-speed trucks, three-wheeled cars, and wheeled self-propelled machinery can all be driven. 2. Examination subjects: The B2 driver's license test is divided into Subject 1, Subject 2, Subject 3, and Subject 4. 3. Examination content: Subjects 1 and 4 are computer-based tests covering traffic regulations and civilized driving. Subject 2 is a practical test, consisting of 16 items: reverse parking and garage shifting, parallel parking, hill start, single-plank bridge, curve driving, right-angle turn, driving over bumps, passing through a width-restricted gate, driving on undulating roads, narrow road U-turn, simulating continuous sharp turns on mountain roads, simulating rainy and foggy weather, simulating slippery roads, simulating tunnel driving, simulating highway driving, and simulating emergency handling.
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What Are the Reasons Why the Key Is Difficult to Pull Out?

The reasons and solutions for a key being difficult to pull out are as follows: 1. Lock cylinder displacement: This issue is more common in wooden door lever locks, PVC door locks, and copper-plated security door lock cylinders. Due to insufficient hardness of the lock cylinder material, lack of lubrication, or excessive dust inside the lock cylinder, accelerated wear can occur, eventually causing the spring at the lock cylinder's tongue to fall off, leading directly to lock cylinder displacement. Solution: Carefully remove the key and promptly replace the worn lock cylinder with a high-quality security lock cylinder to successfully complete the repair of the lock cylinder displacement issue. 2. Lock cylinder wear: As newer locks have increasingly higher security requirements, once the security plates inside the lock cylinder wear out or dust accumulates, it can make the key difficult to pull out from the security door lock. Solution: Add specialized lubricant to the lock cylinder or apply a small amount of pencil shavings to the key, then quickly insert and remove the key from the lock several times. 3. Lack of lubrication in the lock cylinder. Solution: If adding lubricant or pencil shavings does not resolve the issue, cleaning the lock cylinder can also help achieve smooth insertion and removal of the door lock key.
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